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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. When are steers and heifers weaned from bottle feeding?






2. Way to know everything is alright with the breeding male






3. Actual heat cycle (period)






4. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






5. Superior genes are _______ to multiply






6. (male) pushes the testes outward toward the legs for a cool-down off of the body






7. Produce testosterone. located between the seminiferous tubules






8. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






9. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






10. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






11. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






12. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






13. 336 days






14. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






15. 4-6 days






16. 19-23 (21) days






17. What makes the milk flow through the mammary glands?






18. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






19. Animals which have many estrous periods per year (ex: cow - sow)






20. Parturition is controlled by...






21. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






22. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






23. Start of the reproductive tract for the female. located outside of the body






24. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






25. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






26. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






27. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






28. 24 hours before end of estrus cycle






29. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






30. Failure to have one testis (gonad) to descend






31. 1-3 days






32. Milk is 15% ________ and 85% __________.






33. Milk ~305 days - dry 60 days prior to calving






34. 19-23 (21) days






35. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






36. To remove/separate testicles from animal's body before animal reaches puberty






37. 336 days






38. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






39. ~305 days (altough often longer due to breeding difficulties)






40. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






41. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






42. 265-285 days






43. Allows extension of penis without fibro-elastic penis






44. 114 days






45. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






46. Scar tissue plugs up chambers of udder






47. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






48. Why does estrus happen before ovulation?






49. Not under a timeline - cow can not be sold as steak






50. Contains and regulates the temp of the testes for sperm production